The Limited Slip Differential is a good addition for anyone interested in taking the IS-F out on the track, and the interior technology upgrades are long-overdue—can’t say I’m all that enthused about the new wheel design though:

Luckily, the original IS-F wheel design will continue to be an option. (Also, the turn signals are standard in Japan, where this photo is from.)

No word yet on when the 2010 IS-F will be in dealerships, but I would expect some time in September.